I have successfully completed the trailhead challenge in my Dev org which is as follows:
Create a test harness app and component
Let's get set up for doing development right now. You'll create a test harness Lightning application, and add a simple component to it. Then you'll verify that you can see changes in the component.

• Create a new Lightning component named myFirstComponent
• Add this static text to the component: I solemnly swear I know JavaScript
• Create a new Lightning application named harnessApp
• Add myFirstComponent to the harness app with this markup: <c:myFirstComponent/>
• Click the Preview button and verify your text is displayed
• Make a change to the static text so it reads: I am proficient in JavaScript
• Click the Preview button again and verify your change is displayed

When I try to verify the challenge, it displays as error as follows:
Challenge Not yet complete... here's what's wrong: 
The 'harnessApp' Lightning App does not contain ''.

I am unable to understand the error. Anyone who received similar kind of error and were able to proceed further, Please help me with this.

I want to implement cognos report chart in salesforce VF page.
Has anyone worked on something similar.
Couldn't find much help on this topic.
Please help if anyone has any inputs on it.

Hi,
I want to track set-up changes in communities.
I am unable to find them in Audit trail.
Where can I find them?

Thanks!

I have successfully completed the trailhead challenge in my Dev org which is as follows:
Create a test harness app and component
Let's get set up for doing development right now. You'll create a test harness Lightning application, and add a simple component to it. Then you'll verify that you can see changes in the component.

• Create a new Lightning component named myFirstComponent
• Add this static text to the component: I solemnly swear I know JavaScript
• Create a new Lightning application named harnessApp
• Add myFirstComponent to the harness app with this markup: <c:myFirstComponent/>
• Click the Preview button and verify your text is displayed
• Make a change to the static text so it reads: I am proficient in JavaScript
• Click the Preview button again and verify your change is displayed

When I try to verify the challenge, it displays as error as follows:
Challenge Not yet complete... here's what's wrong: 
The 'harnessApp' Lightning App does not contain ''.

I am unable to understand the error. Anyone who received similar kind of error and were able to proceed further, Please help me with this.

Hello!
We are trying to implement SAML 2.0 assertion flow in c#.NET desktop application to allow user to login into Salesforce through his/her domain(Active Directory) credentials. To achieve this, we have done following things so far:

1. We have implemented Salesforce SSO (through ADFS 2.0 & SAML 2.0) and we are able to successfully login into salesforce from browser (Through Identity Provider(IdP) Initiated login approach). URL used in IdP initiated approach: https://adforsfsso.nifdc.com/adfs/ls/IdpInitiatedSignon.aspx?loginToRp=https://saml.salesforce.com

2. Now we are trying to implement SAML assertion flow (Reference URL: https://help.salesforce.com/articleView?id=remoteaccess_oauth_web_sso_flow.htm) to allow user to login into Salesforce within custom c#.NET desktop based application through Salesforce SSO implemented in above point #1 (through user's domain(Active Directory) credentials).

3. We have followed steps given in SAML Assertion flow implementation document (Reference URL: https://help.salesforce.com/articleView?id=remoteaccess_oauth_web_sso_flow.htm). 
    3.1 According to it, we need valid a Base-64 encoded, then URL encoded, SAML response that is normally used for web single sign-on. We have captured SAML response from Web SSO URL (https://adforsfsso.nifdc.com/adfs/ls/IdpInitiatedSignon.aspx?loginToRp=https://saml.salesforce.com) through fiddler. Below is Base64 decoded version SAML response we received from Web SSO URL:
        
        

<samlp:Response xmlns:samlp="urn:oasis:names:tc:SAML:2.0:protocol" ID="_a811a056-b137-4f3e-a2c3-621301effbb1" Version="2.0" IssueInstant="2017-07-06T09:47:21.243Z" Destination="https://login.salesforce.com?so=00D410000012bMN" Consent="urn:oasis:names:tc:SAML:2.0:consent:unspecified">
            <Issuer xmlns="urn:oasis:names:tc:SAML:2.0:assertion">http://ADforSFSSO.nifdc.com/adfs/services/trust</Issuer>
            <samlp:Status>
                <samlp:StatusCode Value="urn:oasis:names:tc:SAML:2.0:status:Success" />
            </samlp:Status>
            <Assertion xmlns="urn:oasis:names:tc:SAML:2.0:assertion" ID="_d42ebb25-d1cb-4025-aad1-1fe282a9d30b" IssueInstant="2017-07-06T09:47:21.243Z" Version="2.0">
                <Issuer>http://ADforSFSSO.nifdc.com/adfs/services/trust</Issuer>
                <ds:Signature xmlns:ds="http://www.w3.org/2000/09/xmldsig#">
                    <ds:SignedInfo>
                        <ds:CanonicalizationMethod Algorithm="http://www.w3.org/2001/10/xml-exc-c14n#" />
                        <ds:SignatureMethod Algorithm="http://www.w3.org/2000/09/xmldsig#rsa-sha1" />
                        <ds:Reference URI="#_d42ebb25-d1cb-4025-aad1-1fe282a9d30b">
                            <ds:Transforms>
                                <ds:Transform Algorithm="http://www.w3.org/2000/09/xmldsig#enveloped-signature" />
                                <ds:Transform Algorithm="http://www.w3.org/2001/10/xml-exc-c14n#" />
                            </ds:Transforms>
                            <ds:DigestMethod Algorithm="http://www.w3.org/2000/09/xmldsig#sha1" />
                            <ds:DigestValue>gIcx+gPXCXxp30W9Fnc2mDvzbzo=</ds:DigestValue>
                        </ds:Reference>
                    </ds:SignedInfo>
                    <ds:SignatureValue>dKcaZRut8Ebmry3fqRPiRyFEl7hdu1ntBkKKemYIS6dfEsXpCHmvoiOQEGHO1ft/h/TlKC7kZ/8sIgS3DU/b54PU4fN2+n3l1f8US+k282LLjAdXN9KeNeUbVvSD3F290p7ThKg+l0zgActQYnt2lEPsiGHt3Gw8v0tUogXS/3bljP0jnRyzX1meQ68qjWEthGUr11QzMENQSsCr51Qpb7TzofxWYKghgd8wYd2JXAtr5QHaiVlSyZHmPJjyZ8k+30oK7SGP+/i9gytr87Gy89aO+PYoWatSd0fa7/YJZZGGN/2r7fwUH0+S/5ZSOsnBY9K1WeDx5Zt1yApYjKSD/Q==</ds:SignatureValue>
                    <KeyInfo xmlns="http://www.w3.org/2000/09/xmldsig#">
                        <ds:X509Data>
                            <ds:X509Certificate>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</ds:X509Certificate>
                        </ds:X509Data>
                    </KeyInfo>
                </ds:Signature>
                <Subject>
                    <NameID>niadmin@nifdc.com</NameID>
                    <SubjectConfirmation Method="urn:oasis:names:tc:SAML:2.0:cm:bearer">
                        <SubjectConfirmationData NotOnOrAfter="2017-07-06T09:52:21.243Z" Recipient="https://login.salesforce.com?so=00D410000012bMN" />
                    </SubjectConfirmation>
                </Subject>
                <Conditions NotBefore="2017-07-06T09:47:21.243Z" NotOnOrAfter="2017-07-06T10:47:21.243Z">
                    <AudienceRestriction>
                        <Audience>https://saml.salesforce.com</Audience>
                    </AudienceRestriction>
                </Conditions>
                <AuthnStatement AuthnInstant="2017-07-06T09:13:07.861Z" SessionIndex="_d42ebb25-d1cb-4025-aad1-1fe282a9d30b">
                    <AuthnContext>
                        <AuthnContextClassRef>urn:federation:authentication:windows</AuthnContextClassRef>
                    </AuthnContext>
                </AuthnStatement>
            </Assertion>
        </samlp:Response>

    3.2 We have checked above SAML response in "SAML Validator Tool" available in salesforce org under "Setup -> Single Sing-on settings". It is showing it as correct SAML response. Please find below screenshot of the same:

    
    3.3 But when we POST Base64 encoded SAML response on OAuth 2.0 token end point (URL: https://login.salesforce.com/services/oauth2/token?so=00D410000012bMN), it is giving following error in json format:

{"error":"invalid_grant","error_uri":"https://na35.salesforce.com/setup/secur/SAMLValidationPage.apexp","error_description":"invalid assertion"}

We have used simple form for now to POST SAML Response. Below is the same:

<html>
<body>
	<form enctype="application/x-www-form-urlencoded" name="testform" action="https://login.salesforce.com/services/oauth2/token?so=00D410000012bMN" method="POST">
	<input type="hidden" name="grant_type" value="assertion" />
	<input type="hidden" name="assertion_type" value="urn:oasis:names:tc:SAML:2.0:profiles:SSO:browser" />
	<input type="hidden" name="format" value="json" />
	<input type="hidden" name="assertion" value="<<BASE64 ENCODED SAML RESPONSE >>" />
	<input type="submit" name="submit" value="Submit" />
</form>
</body>
</html>

Question / Help required:
1. Has anyone has any idea how to resolve this error? (invalid_grant)
2. If you have any valid SAML response, please share.